Arja Valtanen, Stephan Solloch, H. Hartikainen
2009
Citations
2
Influential Citations
12
Citations
Journal
Boreal Environment Research
Abstract
Chlorine radicals are well-known catalysts in the ozone depletion reactions. This study was undertaken to monitor emissions of chloromethane (CH3Cl), an important source of chlorine to the troposphere and stratosphere, from a boreal coastal meadow on the shoreline of brackish-water sea. We sampled volatile organic compounds in the atmosphere above two halophytic vegetation types on three days in July 2007, overall 22 measurements were conducted. Two experimental sites were dominated by Salicornia europaea and two sites were covered by mixed vegetation. A variety of substances of anthropogenic and natural origin were identified, the biogenic organic compounds predominating. The vegetation types did not differ markedly in their CH3Cl flux rates, the daily flux from S. europaea being 10.97 μg m–2 d–1 and that from the mixed vegetation 9.92 μg m–2 d–1. The recorded fluxes agree well with those reported from other coastal ecosystems. Emissions from boreal coastal areas might therefore be a relevant CH3Cl source on the local and global scales.